Dumping grate



S. J. A. WIEBE DUMPING- GRATE Filed Feb. 5, 1925 3 Sheets-Sheet 1 INVENTOR 5.1/9. W/ebe Z By W ATTORNEYS Aug. 30,1927.

s. J. A. WIEBE' DUMPING GRATE Filed Feb. 5, 1925 3.Sheets-Sheot3 70 mvsgvron s 5. J. /i. W/ebe,

A TTORA/EKS Patented Aug. 30, 1927.

UNITED STATES PATENT OFFICE.

SIGURD J'. A. WIEBE, OF EAST ORANGE, NEV JERSEY, ASSIGNOR TO INTERNATIONAL COMBUSTION ENGINEERING CORPORATION, OF NEW YORK, N. 1., A CORPORATION OF DELAWARE.

D'UMIEING GRATE.

Application filed February 5, 1925.

My invention relates to furnace grates, and has special reference to dumping grates for the ash pits of automatic stokers.

An object of the invention is to provide a novel and improved grate of this character.

Another object of the invention is to provide a grate having grate bars of novel and improved construction, which may be easily removed and replaced, and when in place are securely held and the danger of ashes or other line particles sifting down between them is reduced to a minimum.

The several features of the invention, whereby the above-mentioned and other objects may be attained, will be clearly understood from the following description and accompanying drawings, in which:

Figure l is a plan view, partly broken away, of a dumping grate embodying the features of the invention in their preferred form; I

Fig. 2 is a side elevation of the same;

Fig. 3 is a sectional View taken on the line 3-3 of Fig. 1;

Fig. 4. is a View similar to Fig. 3 but with the grate bars forming component parts of the grate removed;

Figs. 5, 6 and 7 are sectional views taken on the lines 55, 66 and T-'T, respectively, of Fig. 3;

Fig. 8 is a sectional view taken on the line 8-8 of Fi l; and

Fig. 9 is aseotional view taken on the line 9 t) of Fig. 3.

The dumping grate illustrated in the drawings is particularly adapted for use in the ash pits of automatic stokers. As shown the grate is provided with a box-like frame 2 having one end secured on the squared portion of the usual rock shaft d. The rear or pivoted end of the grate is substantially cylindrical and any suitable and wellknown means may be provided for directing air through the ends of this cylindrical portion and into the interior of the grate. This rear end of the grate is made in two sections that are secured together by bolts 6 so as to permit the grate to be removed and replaced on the rock shaft l. The grate frame is Serial No. 6,957.

provided with a bottom wall 8, and side walls 10. The parts above described are of a common construction.

In the illustrated construction, the upper edge of each of the side walls is inclined downwardly and forwardly which positions its lower or :iorward end in proximity to the bottom wall, the extremity of each side wall being arranged substantially vertical and spaced from the extremity of the bottom wall so as to provide a shoulder 12.

The top wall of the grate is made up of a plurality of grate bars which extend transversely of the frame and are arranged in overlapping relation and with their ends mounted upon the top loi'igitudinal edges of the frame. The bars are so constructed and arranged as to permit them to be easily removed and replaced and when in place are securely held. As shown the grate bars consist of a series of three bars let, and front and rear end bars 16 and 18, respectively. Each of the bars 14.- is provided with a forward portion 20 of the same inclination transversely as that of the top longitudinal edges of the side walls of the frame, and the forward part 22 of the under side of the portion 20 is substantially horizontal, while the remaining portion thereof is arranged substantially in the plane of the top edges of the side walls of the frame. Each bar- 14 from its forward edge to a point spaced :1 distance back of said horizontal side portion 22 overlaps the rear portion of the bar immediately in front, the lowermost bar 14; of the series o\ 'erlapping the front end bar '16. The overlapping portion of each bar is provided with a series of spacing ribs 2d extending transversely of the bar and forming air passages of uniform depth throughout leading from the interior of the grate. Each bar 1% is also provided with a horizontal portion 20 extending from the inclined portion 20 to a line that is directly beneath the line that defines the rear edge of the hori zontal underside part 22 of the inclined portion 20, and from that point the bar is inclined upwardly and rearwardly parallel with the adjacent portion of the bar imme diately at the rear, the three bars la being the bars 1% overlap each other.

ends received in suitably shaped recesses 28 in the s1de walls of the grate ltran'ie. Each of the bars 1 1 is also provided with a depending rib 30 extending; lon 'itudinally thereof and having its ends received in correspondingly shaped recesses 32 in the side walls of the grate 'l'raine. 'lhe several recesses 28 are continuations of each oti and the recesses 32 are continuation; oi? the re cesses 28.

The top tare of each bar i i: is provided with a series of fuel spacing ribs 34 which extend over the torward edge of the bar, over the inclined portion l and a distance over the forward part or zontal portion 26. Each of the ported by projecting ends 2:36 th or which. are mounted on the top ed s to side walls of the frame. 'llhe to pmftion 38 of each end 36 overle is the rear portion of the end of the bar directly beneath the adjacent surface portions Oi a(:ljaccnt ends being arranged substantially horiz sonl'al. The projecting ends 36 or each bar 14: ject a distance forwardly of tae edge of the remaining; portion ot the bar. It will be understood that the lowermost bar 14: of the series overlaps the lower or front end bar 16 in the same manner that Each bar 1 1 is provided with a depending reinforcing rib 37 which is arranged parallel with the holding rib 30 and is connected therewith by a series of ribs or webs 39.

The front end bar 16 has a substantially horizontal portion 10 which is similar to the horizontal portion 26 off the bars 1 1, an up wardly and rearwardly inclined rear portion 4C2 which is similar to the similarly inclined rear portion ot the bars 14:, a. with a longitudinally extending rib id which is similar to the ribs 30. The endsot' the portion. ot the bar 16 arranged beneath and between the side wall s of the grate flfllllfi are received in recesse which are similar to the rec 1 ends of the rib 4 1 are receive in correspondingly shaped recesses 48 which are continuations of the recesses 46. The ends of the bar 16 which are mounted on the top edges of the side walls of the trains correspond to the ends 36 of the bars 14: except that the for- 7 Ward. edge of the bar .16 is provided with a 1 depending portion 50 which .extends throughout the length of the bar and down over the vertical shoulders 12 and has its lower end surface spaced a slioht distance The fuel supporting surface of the grate bar 16 is provided with ii'uel spacing ribs 06.

The rear end bar 18 is provided with an inclined forward portion 58 which is similar to the inclined forward portions 20 of the bars 1 1-; with a depending rib tit) which is similar to the depending ribs 30 and has its ends received in recesses 61 in the side walls oi the trains; with project?ng ends (52 that are mounted on the side walls and overlap the rear portions of the projecting end St; of the uppermost bar 14; and with :liuel spacing; ribs (5+1 extending over said in :lincd forward portion 58 thereof. The rear portion of the bar 18 is setin a suitably tornied recess 66 in the upper section oi. the rear portion of the frame, and the bar is seci'irely held in place by means ot a bolt 68 which extends through suitable apertures in the bar and in the rear portion or the tranie, the bolt hole in the bar being countersunk.

The spaces between the end portions of the several bars and the walls cl? the recesses in which they are received as above described, are tilled with asbestos or other suitable material 70 (Figs. 6 and. '4") so as to prevent the ashes and other line particles from sitting through these spaces and into the interior of the grate.

in assembling the several bars on the grate, the lowermost or trout end bar 16 is first placed in position and then the ren'iaining bars are applied one atter the other. the securing ot theupper or rear end bar 18 by nieansot the bolt 68, eilj'ec with the holding ribs 30 of the bars 14 and the rib 44; or the lowermost or front and bar 16 to hold all of the bars in place.

From the foregoing itwill be apparent that a dumping grate is provided in which the top wall is made up oit' a plurality o'l overlapping grate bars the bars other the. the endluost ones being o't the saine construction and interchangeable. Also that the relatively long air p ssages between the bars which have their rear portions inclined up wardlyi, eli ectively prevent any sittings from blocking the passages or entering}; the interior or the grate throu 'h these passages, and as the spaces between he end portions oil. the bars and the walls of their recesses are compactly filled by the asbestos material it), it will be apparent that the bars are practically non-sitting. it will also be apparent that the upper bar always prevents the bar immediately below it from lifting up and when the grate is operated and hares vertically, the holding; ribs on the under sides ot the bar resting" in their recesses in the side walls ot' the frame prevent: each bar from dropping out of its position. Also the bars are so constructed that they can be put on a trains of any inclination. without in any way in'ipairing their eliiciencyr As will be evident to those skilled in the tively cooperating art, my invention permits various modifications without departing from the spirit thereof or the scope of the appended claims.

What I claim is:

1. A dump grate of the class described having, in combination, a frame having longitudinal side walls vertically arranged, and grate bars mounted at their ends on the top longitudinal edges of said side walls and arranged in overlapping relation, each of said bars having a depending portion adjacent each of its ends and each of the sine walls having recessed portions for receiving said depending portions, respectively. of the corresponding ends of the bars, and the major portions of the refuse supporting surfaces of the bars being substantially in the same plane.

2. A dump grate of the class described having, in combination, a frame having longitudinal side walls vertically arranged, a plurality of grate bars mounted at their ends on the top longitudinal edges of said side walls and arranged in overlapping relation, each of said bars having a depending portion adjacent each of its ends and each of the side walls having recessed portions for receiving said depending portions, respectively, of the corresponding ends of the bars, a bar extending over the uppermost one of said plurality of bars and having its ends extend over the top edges of the side walls, and means for securing said last iii-entioned bar down upon said side walls, the major portions of the refuse supporting surfaces of the bars being substantially in the same plane.

3.-A dump grate of the class described having, in combination, a frame pivotally mounted at its rear end and having longitudinal side walls vertically arranged, and a plurality of grate bars mounted on the side walls, each bar having its forward portion mounted at its ends on the tops of said side walls, and its rear portion extending between said side walls and arranged heneath the forward portion of the next suc ceeding bar, the overlapping portions of said bars being spaced a slight distance apart to provide air passages between them, and the major portions of the refuse supporting surfaces of the bars being substantially in the same plane.

4:. A dump grate of the class described having, in combination, a frame pivotally mounted at its rear end and having longitudinal side walls vertically arranged, and a plurality of grate bars each having its forward portion mounted at its ends on the tops of said side walls, and its rear portion extending between said side walls and beneath the forward portion of the next succeeding bar, said side walls being provided with recessed portions for receiving the ends of said forward portions of the bars, the

overlapping portions of the bars being spaced a slight distance apart to provide air passages between them, and the major portions of the refuse supporting surfaces of the bars being substantially in the same plane.

5. A dump grate of the class described having, in combination, a frame pivotally mounted at its rear end and having longitudinal side walls vertically arranged, and a plurality of grate bars mounted on the side walls, each bar having its forward portion mounted. at its ends on the top longitudinal edges of said side walls, and its rear portion extending between said side walls and arranged beneath the forward portion of the next succeeding bar, the overlapping portions of said bars being spaced a slight distance apart to provide air passages between them, each of said bars having a depending portion adjacent each of its ends, each of said side walls having recessed portions for receiving said depending portions adja ent the correspoiuling ends of said bars, and the major portions of the refuse supporting surfaces of the bars being substantially in the same plane.

(3. A dump grate of the class described having, in combination, a frame pivotally mounted at its rear end and having longitudinal side walls vertically arranged, and a plurality of grate bars mounted on the side walls, each bar having its forward portion mounted at its ends on the tops of said side walls, and its rear portion extending between said side walls and arranged beneath the forward ortion of the next succeeding bar, the over apping portions of said bars being spaced a slight distance apart to provide air passages between them, each of said bars having a depending portion adjacent each of its ends, each of said side walls having recessed portions for receiving said depending portions on the corresponding ends of said bars, a bar overlapping the rear portion of the uppermost one of said plurality of bars and having its ends mounted on the top longitudinal edges of the side walls of the frame, and means for holding said lastmentioned bar down upon said side walls, the major portions of the refuse supporting surfaces of the bars being substantially in the same plane.

7. A dump grate of the class described having, in combination, a frame pivotally mounted at its rear end and having longitudinal side walls vertically arranged, and a plurality of grate bars mounted on the side walls, each bar having its forward portion mounted at its ends on the tops of said side walls, and its rear portion extending between said side walls and arranged beneath the forward portion of the next succeeding bar, the overlapping portions of said bars being spaced a slight distance apart to provide air passages between them, the rear portion vof the walls of the space between the overlapping portions of adjacent bars being inclined upwardly and rearwardly with relation to their forward portions, and the major portions of the refuse supporting snrfaces of the bars being substantially in the same plane.

8. A dump grate of the class described having, in combination, a bozrlilre frame plvotally mounted at its rear end, having longitudinal side walls vertically arranged with their upper longitudinal edges inclined downwardly and forwardly, and having a bottom wall, a grate bar extending over the front end of the frame and mounted at its ends on the toplongitndinal edges of said side walls, a bar extending over the rear end of the frame and mounted at its ends on the rear portions of the top of the longitudinal edges of said side walls, means comprising a bolt for holding the lastanentioned bar in place and a series of bars for covering the space between said front and rear bars, each of the bars of said series having its ends mounted on the top longitudinal edges of said side walls and having, depending portions adjacent its ends, said side walls having recessed portions for receiving the depending portions adjacent corresponding ends, respectively, of the bars of said series, the forward portion of the lowermost bar of said series overlapping the rear portion of aziness said front end bar, the rear portion of the uppermost bar of said series underlying said lapping portions of adjacent bars being spaced apart to provide air passages between them, and the major portions of the refuse supporting surfaces of the bars, being substantially in the same plane.

9. a dump grate of the class described having, in combination, a frame pivotally mounted at its rear end and having longitudinal side walls vertically arranged, and a plurality of grate bars mounted on the side walls, each bar having the ends of its forvard portion overlapping the tops of said side walls and the surface of said forward portion arrangedsnbstantially parallel with the upper edge of the side walls, andits rear portion extending between said side walls and arranged beneath the forward portion of the next succeeding bar, the overlapping portions of said bars being spaced a dis tance apart to provide air passages between them, and each air passage having its rear portion inclined upwardly and rearwardly W ion to the front portion thereof. I

in testimony whereof, I have signed my name to this specification this 2nd day of l ebrnary, 1925;

sienen J. iii-wines. 

